Jayrock is an open source (LGPL) implementation of JSON

JSON

JSON , or JavaScript Object Notation, is a lightweight text-based open standard designed for human-readable data interchange. It is derived from the JavaScript scripting language for representing simple data structures and associative arrays, called objects...

 and JSON-RPC

JSON-RPC

JSON-RPC is a remote procedure call protocol encoded in JSON. It is a very simple protocol , defining only a handful of data types and commands...

 for the Microsoft .NET Framework

.NET Framework

The .NET Framework is a software framework that runs primarily on Microsoft Windows. It includes a large library and supports several programming languages which allows language interoperability...

, including ASP.NET

ASP.NET

ASP.NET is a Web application framework developed and marketed by Microsoft to allow programmers to build dynamic Web sites, Web applications and Web services. It was first released in January 2002 with version 1.0 of the .NET Framework, and is the successor to Microsoft's Active Server Pages ...

. Jayrock allows clients such as client-side web page JavaScript

JavaScript

JavaScript is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It is a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles....

, to be able to call into server-side methods using JSON

JSON

JSON , or JavaScript Object Notation, is a lightweight text-based open standard designed for human-readable data interchange. It is derived from the JavaScript scripting language for representing simple data structures and associative arrays, called objects...

 as the wire format and JSON-RPC

JSON-RPC

JSON-RPC is a remote procedure call protocol encoded in JSON. It is a very simple protocol , defining only a handful of data types and commands...

as the procedure invocation protocol. The methods can be called synchronously or asynchronously.